为什么此MySQL UPDATE命令不起作用？

Question

I've tried everything I know. I know it's not a database connection thing because I am running this in the same way I INSERT data and it's in the same function file.

function update($name, email, $id) {
    $in = "UPDATE tablename 
           SET (name, email) VALUES('$name', '$email')  
           WHERE id = '$id'";

    mysql_query($in);
}

Answer 1

You SQL should be like this

$in = "UPDATE tablename
       SET name='$name', email='$email'
       WHERE id='$id'";

And as noted by @Falcon, you missed a $ in your function arguments.

Answer 2

Your function

function update($name, email, $id) {

says email and inside is using $email. Change it to

function update($name, $email, $id) {

and check

Answer 3

try

update table_name
set
col1 = val1
col2 = val2
..........where id = $id;

Answer 4

The correct syntax is:

UPDATE tablename 
           SET name='$name',email='$email'
           WHERE id = '$id'

Note: Make sure you sanitize the input.